<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>正则</title>
</head>
<script>
	let str=("I am xiaoming ming ming ,i am fine。 i form China .new i am 99.Hello");
	str.exec(/fine/g);
	
	</script>

<body>
</body>
</html>
